C172 PLT DID NOT USE THE CURRENT CTAF FREQ FOR ARR AT GKY.

Narrative

I WAS FLYING VFR FROM STEPHENVILLE; TX; TO ARLINGTON; TX. I HAD CURRENT COMMERCIAL CHARTS; AND WAS USING A LOW ALT ENRTE CHART FOR NAV AND RADIO FREQS. I FOUND ARLINGTON; AND USED THE CTAF ON THE CHART WHICH WAS 123.00. IT SEEMED STRANGE HOWEVER; BECAUSE THE 2 OTHER ACFT I COULD SEE ON AND APCHING THE AIRFIELD WERE NOT USING THE FREQ. I CHKED MY RADIOS; WHICH WERE IN WORKING CONDITION; AND DOUBLE-CHKED THE FREQ ON THE CHART; BUT EVERYTHING WAS CORRECT AND OPERATIONAL. I FIGURED THAT THE OTHER PLTS WERE LCL PLTS AND WERE NOT USING OR DID NOT HAVE OPERATIONAL RADIOS. I THEN MAINTAINED VISUAL SEPARATION FROM THE OTHER ACFT; (WHICH HAD SINCE DEPARTED) AND I LANDED. I MADE ALL OF THE NECESSARY RADIO CALLS IN THE PROCESS AND LANDED WITHOUT ANY PROBS. ONCE INSIDE THE FBO OFFICE; I ASKED WHAT THE CTAF FREQ WAS THAT EVERYONE WAS USING. I WAS TOLD THAT THE FREQ HAD BEEN CHANGED FROM 123.00 TO 123.07; 1 OR 2 MONTHS BEFORE. I SHOWED THIS PERSON MY CURRENT COMMERCIAL CHART WITH THE WRONG FREQ ON IT; AND HE WAS JUST AS SURPRISED AS I WAS. I WILL NOTIFY COMMERCIAL CHART MAKER OF THIS ERROR; AND I HOPE THAT THE SIT DOES NOT ENDANGER ANY OTHER PLTS BEFORE IT IS RESOLVED.