I use Vortex, so these are imported and exported with Vortex's load order tools---They should work for BGMM but I do not use it, so I CANNOT GUARANTEE the validity (that it'll work). 

Load Orders for my Collection mod lists. 

*** Please Read the description on the collection's page--Vital Info!***

Find the corresponding mod collections here: 

• For Us: Patch 7 Definitive
  https://next.nexusmods.com/baldursgate3/collections/jsexqh/revisions/6?tab=comments

• Basic For Us: Patch 7 Definitive
  https://next.nexusmods.com/baldursgate3/collections/hcpsze

- Collection: Personal Definitive P7
https://next.nexusmods.com/baldursgate3/collections/826b5s/revisions/1?utm_medium=vortex&utm_source=vortex&utm_campaign=view_collection

INSTRUCTIONS: 

1. Download Zip File
2. Unzip file to desktop (or whichever place that isn't your game) 
3. Open the file, and find the load order file you need. i.e., "Basic For Us"
4. Open that file and find the .isx load order file and save it. I like to make a desktop file called: "Mod managing" where I save my mods that i make and load orders for my game. 
5. Open your MM--> I use Vortex so my next few instructions will be based on that MM. BGMM I will try to familiarize with, but I would think it is similar in import and export of load orders. 
6. Navigate to your load order screen, and select "import from File" 
7. Choose the load order file to import--- i.e., "Basics For Us" 
   *** Double check it has been imported correctly-- Trips Shaders should always be at the top, and compatibility framework always at the bottom****
8. Once imported correctly, select "Export Load order to game" 
   ** If you are wanting to add any of the INGMM mods specified on my collections page do so BEFORE importing and exporting load order, or you'll have to close game, re-import and re-export the load order. The In Game Mod Manager has a tendency to overwrite load orders when you download mods from it in game.***
9. That's it! Enjoy your play!