In gimp, it shouldn't pixelate it supposing you are working from the original Gimp file and not a JPG, PNG, etc, it'll be able to rescale everything correctly. Except of course imported images. Those like upscaling DVDs to HDTV level, just fakes in extra pixels.
TransGalactic Brewing. 2012+
Old Dark Tower Brewery, Est 2009.
5gal Primary #1 :
5Gal Primary #2 Empty
MRB Primary #1 : Empty
MRB Primary #2 Empty
Carbed to Beery Goodness! - AHS Lando Cascadian Dark Ale - Brewed 10/28/12, Dry Hoppin 11/4/12, Bottled 11/10/12
Carbing - AHS Clone - Southhampton DoubleWhite - Brewed 11/11/12, Bottled 1/20/13