Youmay be right, what you quoted is also from the Diwan (collection of poetry) attributed to Sayyiduna Shaykh `Abd al-Qadir Gilani and is found here: -
99.com/t83110.html . In fact, since he is known as the Ghawth, whatever poem is attributed to him can be called a qasida ghawthiyya. Allah knows best.
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