In answer to your question from 2019, all of the Gidget movies will be released on Blu-ray this month by Australian label Via Vision.

Hey Jobla:

Do you know any way to get hard-copies of these???

I've found Boot BRs at Street Fairs in the Bay Area SF recently, that are pretty decent. I picked-up a really nice "Local Hero" (now being released on Criterion) and a "Murphy's Romance" and "Earth Girls Are Easy" that all look really nice compared to the DVDs.

GIDGET GOES HAWAIIAN was released as a widescreen MOD DVD by Columbia Classics a few years ago.

GIDGET GOES TO ROME has appeared in a beautifully remastered widescreen print on TCM.