The potentialities of the GaN monolithic technology for the growing microwave backhaul power amplifier market are discussed in this paper. To support this discussion, two GaN monolithic Doherty power amplifiers for 7 GHz backhaul applications are presented. They exhibit 5W output power, with almost 10 dB gain, and high efficiency at 7 dB output power backoff.\ud In particular, one module has been optimized for maximum efficiency at center frequency (47% at 7 dB output power backoff), while the other for high efficiency on a larger bandwidth (15% fractional bandwidth)