Sweet enclosure pickup, now i need ideas.

[Slim]

I don't think Day Geckos would do well in there it's not tall enough.

55 Gal tanks are pretty tall. I've seen Day Geckos thrive is shorter set ups. Give them something to climb vetically on and keep the heat right and it would be just fine. Humidity would be the only problem in that set up, but it could be solved with a simple fogger on a timer.