The 5.7 version of AstroGC for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program is categorized as Lifestyle Tools. The actual developer of this free Mac application is MacDev. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
Astro GC will give you a short astrological analysis of your character. The "Astro" files are based on a friends astrology notes, she has passed away a while back and this program was made in her memory. AstroGC is more an rtfd reference tool then an "application" per say.
You may want to check out more software for Mac, such as TimePassages Folder, LDS Scriptures or Opera Bible, which might be similar to AstroGC.