iMac graphics card upgrade?

Heyo! I recently bought my first iMac! Its a 2010 imac, 27", core i7-870, 12gb RAM, and a Radeon HD 5750. Ive already upgraded to an SSD, which got me thinking on other possible upgrades. Is it even possible to upgrade the graphics card in this machine? I think it would go well with a GTX 1050, but would it even work? Thanks for any help you can give!