Hi. My G tile was on hunger strike for about a month and a half last winter. I was very worried for it.
But in the end it didn't seem to suffer too much. It was not overly thin after that time and ended up eating again.
I found some reports stating that G tile needs alteration in salinity to keep eating without an occasional strike. Could'n confirm them, though. I did try it myself at about a mont or so, but noticed no immediate impact.
If yours has been eating well and is healthy, you don't have to worry for a while. My 2c.