Sounds like G: is a mapped drive on your machine. Even if you held the G: indicator, this would only work if the dive was mapped to G: for all users. Better to use the UNC (uniform naming convention) path for the links, e.g. \\bigserver\public\John\Procedures\Policy.Doc
Look up UNC links in Access help to get you started.
You can't always get what you want, but if you try sometimes you may just get what you need - Rolling Stones