A pilot reported that the Morse code dot and dash identifier for CAK Runway 23 is incorrectly shown on the NACO chart as I-GZZ vs. the correct I-GGZ.

Narrative

Decided to divert to CAK for a rest stop as winds were stronger than forecast. Requested diversion and was handed off to Akron in the descent. Checked in with the ATIS code for CAK and altitudes. Maintained flight plan track and after almost 10 minutes of checking in requested clarification that new destination was CAK. The CAK Approach Controller indicated that he did not have that information. On vectors to ILS 23; tuned in the ILS 23 identifier. Listened and watched the Morse code; they didn't match. Finally after about 3 reads of the Morse; I realized that the NAVAID was broadcasting the correct code; but the chart had a typo. Instead of I-GGZ as broadcast; the Morse was published as I-GZZ on the NACO version of the plate. The commercial approach plate has it correctly indicated. I reported the discrepancy to the Approach Controller. It took a several transmissions to describe the issue. I just checked and there is no NOTAM in the system for this publication error. The distraction level is nominally a flight safety issue; and should be considered totally unacceptable.