A GFR > 60 is considered normal. Often, these tests estimate the GFR by a formula using various blood levels including the creatinine. The report often will say > 60 because a GFR > 60 is often the cut off point where one no longer needs to be concerned about adjusting medication doses, etc. for a low glomerular filtration rate.
The GFR is one way to measure kidney function. When kidney function declines, often the GFR will also decline.
Advice and opinions given are based on the information provided and must not be considered an official medical recommendation. The limitations of the internet prevent an appropriate evaluation. Always consult your doctor if there is concern.