How to control gali-74+ amplifier gain

At 30MHz frequency am getting 23dB gain for gali-74+ i would like to reduce the gain . is there any chance to reduce the gain of gali-74+.

thanks in advance,

Place an SMD Attenuator at its Input.

Place an SMD Attenuator at its Output, to reduce the gain and to keep good noise figure.
Also you can increase the Rbias resistor value, but this will reduce the linearity of the circuit. Usually doubling the resistor value it will reduce the gain with about 6dB.

Generally speaking AGC(Adjustable Gain Control) is a method for gain control, as other members noted, by putting a adjustable attenuator at the Input or Output of the DUT. You can place a Variable Attenuator which can be programmed by SPI at the output, then program it for the overall gain you want; there are devices with 0-32db attenuation with 0.5db steps, that may work for you.