The GGT3P gene, also known as a pseudogene, was predicted to enable glutathione hydrolase activity and peptidyltransferase activity, specifically influencing a variety of biological processes. Below, I have provided answers to your questions based on the current understanding of GGT3P:

### 1. Associated Genes:
While specific associations are not explicitly mentioned in the provided summaries, genes often involved in similar pathways or cellular processes might include:

- **GGT1 (Gamma-glutamyltransferase 1)**: This gene encodes an enzyme involved in the metabolism of glutathione and other gamma-glutamyl compounds, suggesting a functional proximity.
- **GCLC (Glutamate-Cysteine Ligase Catalytic Subunit)**: This gene is crucial for the synthesis of glutathione.
- **GCLM (Glutamate-Cysteine Ligase Modifier Subunit)**: This gene also contributes to glutathione production and metabolism.
  
Other genes related to oxidative stress and glutathione homeostasis may also have associational relevance.

### 2. Aging and Age-related Diseases:
While specific research on GGT3P in the context of aging or age-related diseases is limited, since it is linked to glutathione metabolism, which is crucial for cellular antioxidant defense, deregulation of glutathione in various tissues has been associated with aging. Accumulation of oxidative stress and inflammation is known to affect aging processes. Therefore, indirectly, GGT3P’s role in glutathione-related reactions may have implications for studies involving age-related diseases like neurodegenerative disorders, cancer, and cardiovascular diseases.

### 3. Known Drug Interactions:
Currently, specific drugs or drug classes that directly target GGT3P have not been well-documented, especially since GGT3P is a pseudogene with no coding potential. However, drugs that impact glutathione metabolism, such as:

- **N-acetylcysteine (NAC)**: An antioxidant and mucolytic that boosts glutathione levels.
- **Glutathione precursors**, like the aforementioned GCLC and GCLM interactions.

While not directly interacting with GGT3P, these could impact related metabolic processes.

### 4. Pathways and Biological Processes:
GGT3P is predicted to be involved in various pathways and biological processes, including:

- **Peptide Metabolic Process**: Involved in the breakdown and modification of peptides.
- **Response to Estradiol**: Suggesting involvement in estrogen signaling pathways.
- **Response to Tumor Necrosis Factor (TNF)**: Indicative of its potential role in inflammatory responses.

Additionally, GGT3P’s glutathione hydrolase activity implies participation in pathways related to oxidative stress response, detoxification processes, and possibly cancer progression due to its connection with intercellular signaling and stress responses.

### Conclusion:
GGT3P is a pseudogene related to gamma-glutamyl transferase pathways, with indirect associations to oxidative stress and peptide metabolism. Further investigation into its potential roles might elucidate its influence on both normal physiological processes and disease states. As research evolves, the understanding of GGT3P’s implications in health and disease may become clearer.