CFLs are a poor choice for GDO applications. The intermittent use can reduce the lamp life, and most CFLs don't achieve full brightness for a minute or so, leaving you with dismal light when you need it most. Use an A19 ("regular bulb shape") LED or one of the newer high-efficacy halogens (100watts of light at only 70 watts draw, for example) instead. Unless, of course, your GDO is a primary light source as well.
If you are set on using CFLs, use ones made by Sylvania that resemble old-fashioned lamps. I use these in various places where fitting a spiral or u-tube lamp that has a large base is not possible. Another bonus is the entire spiral lamp is enclosed by a rather heavy plastic casing, making them practically rough-service.