Imports from roll20/foundry possible?

[Sunny]

Can you import stuff from roll 20/foundry?
I'm a new DM and FGU looks ideal since I'm not much of a numbers guy and FGU looks to do alot of automation while looking pretty on top of that.

For example Valda's Spire of Secrets .pdf for my current game is available for roll20/foundry, but not for FGU as far as I can see, but I'd like to use it though.
Also foundry has several homebrews that you can just import with a buttonclick.

[Aussie Hope]

No, and I doubt you will ever be able to as to the best of my knowledge Roll20 and Foundry do not have unique item IDs for everything like Beyond and FGU.
Some clever person, who loves data mapping, might have set something up for D&D beyond, but it would be a labour of love that would need to be updated every time a new D&D manual came out. As FGU already has a character wizard that is similar to beyond's, while handy, it would also be a little redundant.

[Sunny]

Hmm... that's a shame, but I would probably be able to setup on a smaller scale as I do have coding experience. I'll just treat it as homebrew that gets updated as players need it.

How deep can you customize skills in FGU where effects still are automated? For example homebrew overlapping auras that cancel eachother out are particularly dreadfull to handle in most cases.

[Aussie Hope]

You can do quite a lot in FGU for 5e, there is also an addon feature that lets you do tempo (Automate Temporary HPs).
https://www.fantasygrounds.com/wiki/index.php/5E_Effects so you just add it as an action either to your campaign or to a character's sheet actions and drag and drop it onto a character or NPC in the combat tracker. Once you start combat and either roll dice or cycle through initiative it's all automated, even recharge effects like dragon breath. I think (I don't own it) there is an AOE mod in the Forge that you can buy for a few $$ that actually automates paladin save aura's and such.

[Smiteworks]

FGU has a few features that make it pretty easy to copy text from PDFs or web sites into the Reference Manual Builder and there is an NPC import feature as well for 5E.