500 000gil missing?

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Date & Time: 02. april 2018
Frequency: 1
World name: Odin
Character name: S'phel Nunh
Class/Level: 70
Party or solo: solo
Retainers: Maggiered, Pinkiie

Connection Specs
- Type of internet connection/provider: 120mbps broadband
- Modem maker/model number: Sagecom FAST3686

■ PC Specs

-=-=-=-=- System Information -=-=-=-=-
SYSTEM_OS Windows 10 Pro 64-bit (6.2, Build 9200) (16299.rs3_release.170928-1534)
SYSTEM_CPU Intel(R) Core(TM) i5-8600K CPU @ 3.60GHz (6 CPUs), ~3.6GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 6 SYSTEM_CORE_PHYSICS 6
SYSTEM_BIOS 0606
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 16319.863MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 18751.863MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 237.873GB SYSTEM_FREEDISC_SPACE 190.792GB
SYSTEM_STORAGE E:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 223.444GB SYSTEM_FREEDISC_SPACE 76.713GB
SYSTEM_STORAGE F:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 223.444GB SYSTEM_FREEDISC_SPACE 223.323GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce GTX 1080
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP GeForce GTX 1080
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 8079.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 8159.932 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 2560 x 1440 (32 bit) (144Hz)
SYSTEM_GRAPHICS_DRIVER C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 23.21.0013.9077
SYSTEM_GRAPHICS_DRIVER_DATE 1/23/2018 02:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English 3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_GRAPHICS NVIDIA GeForce GTX 1080
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY2
SYSTEM_GRAPHICS_CHIP GeForce GTX 1080
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 8079.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 8159.932 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 1920 x 1080 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_7a39871618b19f06\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 23.21.0013.9077
SYSTEM_GRAPHICS_DRIVER_DATE 1/23/2018 02:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English 3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND ASUS MG279 (NVIDIA High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {1737CF8E-84ED-4E23-808A-C0D43F999DB8}
SYSTEM_SOUND_DEVICE_NAME nvhda64v.sys
SYSTEM_SOUND_DRIVER_VERSION 1.03.0036.0006
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 12/15/2017 00:00:00
SYSTEM_SOUND Focusrite USB (Focusrite USB Audio)
SYSTEM_SOUND_DEVICE_ID {94064B81-DA94-43C5-9DAF-7FD6534E2CA5}
SYSTEM_SOUND_DEVICE_NAME FocusriteUSBAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 4.36.0005.0612
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 1/9/2018 00:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 5 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 128 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {562F3D40-0798-11E8-8002444553540000}
SYSTEM_INPUT_NAME MASTERKEYS PRO S
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {562F3D40-0798-11E8-8001444553540000}
SYSTEM_INPUT_NAME SteelSeries Rival
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 265 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {562F3D40-0798-11E8-8003444553540000}
SYSTEM_INPUT_NAME MASTERKEYS PRO S
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 18 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {562F3D40-0798-11E8-8004444553540000}
SYSTEM_INPUT_NAME MASTERKEYS PRO S
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {562F3D40-0798-11E8-8005444553540000}
SYSTEM_INPUT_NAME Rival Gaming Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {562F3D40-0798-11E8-8006444553540000}
SYSTEM_INPUT_NAME Rival Gaming Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 4096 SYSTEM_GAMEPAD_FOV 0
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Issue description:
Hi, so with all those details out of the way; this is what happened.
I noticed (02.april 2018) that about 500 000gil was gone from my character without it making any sense. Last time I remember (30.march 2018), I had about 700 000 to 800 000 gil. I am fairly sure I did not purchased anything from marked board for several days prior to discovery, so that can't be it. I checked my retainers, in case i did a transfer, but no luck.
How can I go about checking where my gil went?
The GM Team checked, and could not find any details or indicators, and thus referred me to here.
I hope there is help to find somewhere, thanks in advance for any help.
Best regards, S'phel Nunh

Ps: first time poster, may i have some dampening buffs against mistakes? thanks :3