Gingrich is not known for being an ass kisser even within his own party it is not common for him to praise someone unless he fully backs them. He tends to be one of the harsher critics even in his party at times, so I don't think the above statement really fits.
I don't doubt that Gingrich thinks Palin is important
she's very helpful in getting dumbfounded dipshits to open up their wallets
Gingrich is not dumb and I'm pretty sure he knows Palin is an intellectual lightweight but that's not what makes her "tremendously important"