I collect some info for you:
Muslims restaurant of Guangzhou 清真菜--Halal
Arabian Nights Restaurant Daily 9am-2am. No cards. 4/F, 17 Ji Chang Lu (8655 5278)
Bostan Daily 7am-2am. No cards. East Tower, Xinjiang Bldg, 76 Tian He Bei Lu (8753 7788 ext 1706)
Delicious Muslim Food Daily 24 hours. No cards. 65 Dong Du Da Shi Jie, 475 Huan Shi Dong Lu (8762 6466)
Muslim Food Restaurant 24 hours. No cards. 82 Heng Fu Lu (8358 9625)

Natural Door Indian Chef (Halal Food) Daily 11.30-1.30am. No cards. 1）21 Yu Shan Lu, by Beijing Lu (8319 7141); 2）2/F, 3 Nong Lin Xia Lu (8775 1677)

Indian ---Halal

Jewel of India Daily 11.30am-3pm, 5.30-11.30pm. No cards. 30 Ti Yu Xi Lu (8559 3882)

Maharaja Indian Kabab Corner Daily 11am-2:30pm, 5-10:30pm. No cards. Shop S217, Shopping Arcade, 2/F, China Hotel, Liu Hua Lu (8666 6888 ext 2217)

salam bro. halal foods are available near the xiaobei metro station.

Sure! You can go to the Salam Restaurant on 2F, Xindengfeng Hotel, No.2 Baohanzhi Street, Yuexiu District. It is adjacent to the Exit D of Xiaobei Metro Station, so you can easily find it. ;)