The following table shows the relationship of the gyro operating gain in respect to the displayed value on the screen of some popular radio control transmitters.
Gyro Operating Gain >>>

Gyro 100% Rate

80% Rate

0%

77% AVCS 
Gyro 100% AVCS

Gain Pulse Width 
1020uS 

1520uS 

2020uS 
Futaba Gyro Menu 
100% 

0% 

100% 
Futaba Endpoints 
90% 

0% 

90% 
JR/Spektrum Gyro Menu 
 
0% 
51% 
100% 
 
JR/Spektrum Endpoints 
126% 

1% 

129% 
Alternatively the exact operating gain can be computed using the mathematical equations below:

Rate Mode

AVCS Mode

Gain Pulse Width 
GyroGain = (1520  PulseWidth) / 5 
GyroGain = (PulseWidth  1520) / 5 
Futaba Gyro Menu 
GyroGain = MenuValue 
GyroGain = MenuValue 
Futaba Endpoints 
GyroGain = EndpointValue * 100 / 90 
GyroGain = EndpointValue * 100 / 90 
JR/Spektrum Gyro Menu 
When the menu value is less than 51
GyroGain = (51  MenuValue) * 80 / 51 
When the menu value is greater than 51
GyroGain = (MenuValue  51) * 77 / 49 
JR/Spektrum Endpoints 
GyroGain = (EndpointValue + 1) * 80 / 127 
GyroGain = (EndpointValue1) * 100 / 128 
Example 1:
When the gain value shown on the DX7 gyro menu is 70%. We use the equation
GyroGain = (MenuValue51)*77/49 and replace MenuValue with 70%. Therefore:
GyroGain = (7051)*77/49 = 30% AVCS
Example 2:
When the gain value shown on the DX7 gyro menu is 30%. We use the equation
GyroGain = (51MenuValue)*80/51 and replace MenuValue with 30%. Therefore:
GyroGain = (5130)*80/51 = 33% Rate
Please see your radio system's user guide for specific instructions on how to adjust the gyro gain through the dedicated gyro menu or gain channel endpoints.