Downloading gDisk 0.6.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The following version: 0.6 is the most frequently downloaded one by the program users. We recommend checking the downloaded files with any free antivirus. The software lies within Productivity Tools, more precisely Cloud Services. The actual developer of this free software for Mac is net.sourceforge.
From the developer:
gDisk is software that turns your GMail account into a portable hard drive so you can always have your important files accessible accross the Internet. gDisk uploaded files will appear in your Gmail account as attachments to messages labeled yourlabel. gDisk . gDisk is a mighty handy way to store files online and access them from anywhere via Gmail.
You may want to check out more software for Mac, such as DropShare, TeamDrive or Memonic Desktop, which might be similar to gDisk.