In Guangzhou airport have a shower room to get a shower?

Yes, there is the Hourly Charged Passenger Lounge in this airport, which includes shower room.

Room Rate
Business Class:
Hourly Room (08:00-16:00): RMB25/hour, Maximum at RMB100;
(16:00-next day08:00): RMB50/hour for the first four hours, RMB25/hour from the fifth hour till 08:00, Maximum at RMB260.

First Class：
Hourly Room (08:00-16:00): RMB40/hour;
(16:00-next day08:00): RMB80/hour for the first four hours, RMB40/hour from the fifth hour till 08:00, Maximum at RMB380.

Address & Tel:
For more information, please kindly contact Front Desk at 86-020-36068300.
Address: The negative layer of terminal (subway.)